Rotary pump



Oct. l, 1929.

L., DINEsEN ROTARY PUMP Filed Feb- 28, 1927 5 Sheets-Sheet 1 Oct. l, 1929. DINESEN v y 1,729,764

ROTARY PUMP v l Filed Feb. 28, 1927 3 Sheets-Sheet 5 Patented Oct. l1,1929

UNITED STATES PATENT OFFICE ROTARY Pinar Application filed February 28, 1927. Serial No. 171,478.

My present invention has for its object to provide an extremely simple and highly etticient vibrationless rotary pump or motor that can be operated vat high speed, and to such ends, generally stated, the invention conslsts o the novel devicesv and combinationsof devices hereinafter described and defined in the claims.

In the accompanying drawings, 1o lustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings: Fig. 1 is a front elevation showing one form of the invention;

Fig. 2 is a view principally in central vertical section;

Fig. 3 is a plan View of the same,

Fig. 4 is a view partly in section taken on Fig. 5 is a rear elevation of the rotor removed irom the casing;

Fig. 6 is a perspective view of the rotor with a portion of its shaft broken away;

Fig. 7 is a perspective view of the piston removed from the rotor;

Fig. 8 is a view of the piston in section taken on the line 8-8 of Fig. 'Z

Fig. 9 is a perspective view of the trunnion and its coupling head.;

Fig. 10 is a view principally in horizontal central section showing another form oi the invention;

Fig. 11 is a view partly in elevation and partly in section taken von the line 11--11 of Figs. 12 and 13 are perspective views showing, respectively, one of the pistons and the coupling head-equipped trunnion removed from the pum shown in Figs. 10 and 11.

leferrin rst to the invent-ion as illustrated in Flgs. 1 to 9, inclusive, the numeral 14 indicates a cylindrical casing havingv a supporting base 15 adapted to be bolted-to a bed or other support.

The front of the casing 14 is in the form of a removable head 16 held in place by a plurality of screws and having a bearing 17 closed at'its outer end. Formed with the back of the casing 14 is along hearing 18 havin a 50 stuiing box 19. It is important to note iat which ii;

the axes of the bearings 17 and 18 are 'parallel l and that the axes of the bearing andthe casing 14 are aligned and that the axis of the bearing 17 is eccentric thereto. Formed with the casing 14'are `bossed, internally screw# threaded intake and discharge pipe-attaching openings 20 and 21, respectively.

Mounted in the casing 14 is a cylindrical rotor 22 which completely illssaid casing with just enough clearance at its sides and periphery to run freely. A shaft 23 driven from an electric motor or other` vise has its innerend portion journaled in the bearing 18 and rigidlyA secured to the rotor 22 at the back thereof and in axial alignment therewith. Formed in the inner cylindrical face of the casing V144 are radial intake and discharge ports 24 and 25, the former of which leads from theintake opening-20 and the latter of which leads to the discharge opening' 21. The casing 14 has diametrically'opposite port closing surfaces 26 and 27" which separate the I ports 24 and 25.

A double-acting piston 28 is mounted in a seat 29 formed in the face of the rotor 22 and extends dametrically therethrough and corresponds to the customary piston cylinder. l

Said piston 28 is rectangular in cross section and its seat 29 is correspondingly formed. An

axiallylocated cavity 3() is formed in the face of the rotor 22 and is somewhat shallower than the seat 29 so that the sides of said seat are continuous and engage the piston 28 throughout its ent-ire length. 'lhe cylinder head 22 holds the piston in its'seat 29 and said piston has a pair of pockets 31 in its back and also in its face for holding a lubricant.

The piston 28 is held to turn about an axis eccentric to the axis 4of the rotor 22, with freedom for lateral shifting movement, by a trunnion 32 mounted in the seat 17 and having a y coupling head 33, with attened sides, whlch is mounted in atransverse seat 34 formed inl the face of the piston 28 at the longitudinal center thereof. Said coupling head 33 and seat 34 separably connect the piston 28 and trunnion 32 for common rotation but permit i free lateral shifting movement of said piston on the couplinghead 33 produced by thc ro.

ltationof the rotor 22 and piston 28 on -eccentric axes.

The liquid passing through the pump keeps the movable parts t ereof lubricated, and an vaxial duct extends completely through the vsurface 27, which is between the receiving endl of the intake port 24 and the delivery end of the discharge port 25,` is empty and completely closed by the iston 28. The other end of the seat 29, vv ich is closed by the casing surface 26, is open to its full intake capacity and completely filled With liquid. During the balance of each hali:l ro-y tation of the rotor 22, said rotor, by its peripheral contact with the casing surfaces 26 and 27, separate the ports 24 and 25.

rIhe rotor 22 is turned in the direction of' the arrow marked thereon in Fig. 4 and as the piston seat 29 is moved out of registration with the casing surfaces 26 and 2 7 the end of said seat in` communication with the port 24 is gradually lopen and filled with l liquid, and by the time it reaches the casing by the piston 28 and the liquid therein dissurface 26 it is completely open and filled. At the same time the other end of said seat 29, Wluch is filled With liquid, is being closed charged into the port 25 and through the discharge opening21. j

To adapt the above described rotor pump for use in connection with oil burners or for other uses Where it is necessary to deliver a` small quantity of oil, Which is very ditlicult' vto do by a continuous stream, I accomplish the desired result by an intermittent.action. This feature of my pump includes a passage 36, aY port 37, and a by-pass 38. `The passage 36 leads fromy the discharge ort 25 and is formed in the casing 14, at t e toppand back thereof, and the port 37 i.s'"formed in said casing and .from the interior there-- of, back of the rotor 22, to a bossed discharge` openino 40 in said casing, that is internally screw-threaded to receive and hold adischarge pipe, not shown. The by-pass 39 is formed in the back of the rotor 22 and is arranged to connect the passage 36 with the port 37 once during; each rotation of said rotor. 'y

-A needle valve 41 for the :port 37 is provided to vary, at will, the liquid-conducting capacity of said p'rt.

Obviously, each time the by-pass 38 connects the port 37 with the passage 36 a small amountl of liquid is discharged into the opening 40 from the dischargeport 25. As only a very small quantity of the liquid assing .through the pump is deliveredto t e dis-V charge opening 40 the balance of said liquid passing through thel discharge opening 21 may be used for any desired pur ose or it may be returnedI to the supply ta Referring now .to the invention shown Figs. 10 to 13, inclusive, the construction is -substantially the same as that shown in Figs.

and a stuffing box-equipped bearing 49 inv v which the driven shaft 50 of the rotor 42 is i journaled. The pistons 43 and 44 are mount ed in the same plane and have in. their opposing faces relatively large transverse passages 51 Which permit said pistons to lit, the one Within the other, with freedom for independent transverse shifting movements.

Said pistons 43 and 44 are further provided' at the backs of their passages v51 with transverse seats 52 in which is mounted a coupling s block 53 slidably mounted on a trunnion 54 on the inner faces of the head 48, and extendsthrough an oblong aperture 55 in the piston 43. -The piston 44 is also provided With a like aperture 56 which makes the ttvo pistons 43 and 44 duplicates so that they may be .interchangeably4 used. The axis of the trunnion 54 is eccentric with the axis of the rotor 42 `and its coupling blocks' 53 holds said pistons for common rotation about the axis of said trunnion with freedom for independent transverse shifting movements.

EThe trunnion 54 is provided with a duct 5.7lfor the passage of a lubricant in the casing 47 through the a erture 56 and from thence tothe backof e piston 44. Radial intake and discharge ports 58 and 59 are formed in the casing 47 with port-separating surfaces 60 formed with said casing Formed with the casing 47 is a bossed internally screw-threaded opening 61 which opens into the intake'port 58 for connecting Aa supply pipe thereto, and' an internally screw/threaded bossed opening 62 is formed Y i in the casing 47 for connecting ay discharge pipe to the discharge pipe 49. -What I claim is: `1.In a rotary pump, a casing, a rotor in the casing 'having a piston seat extending dia.- metrically thereof, apiston mounted i'n said seat and having an intermediate transverse seat, a trunnion eccentric to the .axis of the rotorv and 'having a. iiat coupling'head extending into the seat in the piston and holding said piston to turn about vthe axis of the trunnion but permitting lateral A meer movement thereof, said trunniod and its head being mounted to .rotate with said pistn. A L y 2. In a rotary pump, a casing having an' intake passage and a discharge'` passage, a port leading from the intake passage to the casing, and a rotor having a byass arranged to intermittently connect t e port with the discharge passage during the rotation of said rotor.

3. The structure defined in claim 2 in further combination witha choke valve for the port.

'In testimony whereof I aix m signature. LAURITS DESEN. 

